Compatibility: Fits the factory-supplied anode terminal on tubes such as the 4-1000A , 3-1000Z, 4PR-1000A, and 833

Mounting: This is a massive, 8-fin plate cap which fits snugly on the factory terminal using a 5/64″ hex screw. Nests down on terminal about 1/4 inch, so extends about 1 inch above terminal, not including the screw on top for plate lead attachment